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Re: Electric Fan Wiring

To: Mark Meswarb <meswarb@hotmail.com>
Subject: Re: Electric Fan Wiring
From: Steve Laifman <SLaifman@SoCal.RR.com>
Date: Sun, 11 Mar 2001 10:44:02 -0800
Mark,

I recommend that you do NOT use the thermostatic sensor.  A simple
toggle switch, like the Lucas one for your instrument lights, could be
made to fit the plugged Alpine choke hole, with a little would carving
behind the dash, and look "in-place".  When your car gets over your
desired max., or in heavy traffic, just turn it on.  MIne brings the
temperature down to normal very quickly.  Need a good fan and motor.
The wiring is simple, with an in-line fuse to either of the two fuses
already there.  I suggest the ignition switched one.

Any reduction in temperature after the motor is off is confined to the
radiator core only, and you eliminate the issue of a failed thermostat
switch which keeps it running until the battery is dead.

The MAIN problem with the thermostatic devices is that they are jammed
in between the radiator tubes.  Motion during car movement causes it to
wiggle ever so little.  After a short time it has loosened itself by
wearing away at you radiator tube wall, and wiggles some more.  One day
it will wiggle itself right through the tube and you have a water leak,
under pressure.

Not a good idea. The factory installed units screw into a threaded plug
and do not have this issue, however they are still prone to closed (or
open) circuit failures as they are simple bi-metallic strips and
contacts carrying a fairly heft current that can arc the contacts.

Stay away from a known cause of multiple failures.  Use a switch.

My $0.02 .

Steve

--
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